Edward e



(No Model.)

B. E. GOLD.

HEATING APPARATUS.

Patented Au MT/VESSES,

rains llnirnn EDVTARD E. GOLD, OF NEW YORK, N.

HEATING APPARATUS.

SPECIFICATION forming Application filed August 25, 1587. Serial No. 247,795.

part of Letters Patent No. 388,772, dated August 28, 1888.

(No model.)

To all whom it may concern.-

Be it known that I, EDWARD EGOLD, of New York city, Sew York, have invented certain new and useful Improvements in Heating Apparatus, of which the following is a specification.

Hy invention relates to combined steam and hot-water heating apparatus, more particularl y adapted to r hcatin g rail roadcars, but also applicable for heating buildings and for other purposes. It relates to that class of apparatus wherein a water-circuit is supplied with both a steamradiator and a heatingstove, whereby the water may be heated and circulated by the application of steam alone or fire alone, or both together, as in my pending applications, Nos. 230,307 and 238,590. My present improvements lie chiefly in the special construction of the steam-heater and stove-heater and the watcncircuit in relation thereto 5 and it consists mainly in having a tubular coil as part of the watercircnit and a tubular coil as part of the steam-heater, one coil being incloscd within the other, whereby the water in the water-coil is rapidly heated and circulated by the direct action of the steam in the concentric steam-coil, This compound coil is placed within a stove, so that when steam is not supplied the coil may be heated by the direct action of the fire; This stove is provided with airinlcts from the external air and airoutlets within the car or apartment heated, so that when the stove is not fired, but the stcamcoil is in operation, the stove may act as an air-heatcr and ventilator by allowing fresh air to be drawn in over the compound coil and discharging it-heated into the apartment.

My invention therefore consists mainly in the features above outlined, as hereinafter fully set forth and claimed.

in the drawings annexed, Figure 1 is a ver tical section of my improved heating apparatus, shown fitted in the corner of a railwaycar. Fig. 2 is a sectional plan on a; so.

In the drawings, a indicates the pipes of a hot-water circuit or circulating system, the terminals of which connect to a water-heating coil, A, which is placed within the chamber of a hcat-iugstove, B. The ascending branch of the watercircuit opens into an elevated ex as usual in car-heaters of this passion-box, c,

class, while the descending branch continues from the top of the box to the floor of the car, and passing around the same crosses, in the usual manner, under the floor at one end of the car and connects to the lower terminal of the heating-coil A, as shown in Fig. 1. The circuit is not shown continuous in the drawings, as the construction of such circuits is well understood, the pipe a being shown broken off near the stove; but the broken ends are of'coursc presumed to be connected through a continuation, forming a continuous circuit, as will be readily comprehended.

In heating railway-cars, where the watercireuit lies chiefly below the heating-coil and stove, the elevated expansion-box c is of course necessary to insure the circulation of the water; but where the water-circuit is carried above the heating-coil this expansion-box will not be necessary.

New, referring to 1, it will be noted that within the water-coil A, I place concentricall y a second coil, D, of smaller pipe, which serves as a steam-heating coil, the ends of which steam-coil project from the Ts inm, which connect the ends of the water-coil with the terminals of the water-circuit pipe a, as best shown in Fig. 1. The projecting ends of the small pipe-coil D arethreaded with a running thread, and are secured in the Ts by bushings (Z and loelrnuts c, thus enabling the ends of the steam-coil to issue water-tight from the water-coil without having the bore of either coil communicating, while the water of the water-circuit fills the space between the two coils, but cannot enter the steam-coil, as will be understood from Fig. 1. The outer coil, A, I prefer to make of pipe of two inches diameter, while the inner pipe is three-fourths of an inch in diameter, thus providing ample water-space between the two for free circulation of water.' The upper end of the steam-coil connects to an angle-valvaf, on the top of a steam branch pipe, 9, which extends from a main stcamsupply pipe, h, which is supplied from the engine or other source of steam or heating fluid, and preferably extends l0ngi tudinally under the car, as shown. The lower end of the steam-coil connects to a small trap, i, preferably of the thermostatic kind shown in my patent, No. 350,880, dated October 12, 1886,

and from this trap a drippipe, It, extends through the floor of the car to discharge the condensation on the track. It will therefore be now readily understood that when steam is admitted to the coil by opening the valvef it will be rapidly condensed in the water-surrounded coil,and a great quantity of heat thus transmitted to the water between the two coils, thereby causing the water in the water-circuit to become rapidly heated and circulated. It will be readily appreciated that by this means the heating and circulating action will be most certain and efficient, as the heat of the steam is applied to the core of the water-coil along its whole length,which is a new and important feature in combined steam and hot-water apparatus,and its construction is simple and inexpensive.

It will be understood that according to my invention it is immaterial whether the steamcoil is within the water-coil, as shown, or the water-coil within the steam-coil, provided one is inclosed within the other; but it is considered much more efficient and convenient to have the steam-coil within the water-coil, as illustrated. The coils may be made of iron pipe, or of brass or copper pipe, preferably, and both pipes are coiled together after being cut to the right length, threaded, and slipped one within the other.

It will be seen on reference to Fig. 1 that the stove is formed with two shells or casings, Z n, with an air space or jacket, 0, between the two, and that the interiorof thestove below the coil is provided with a fire-pot, p, a grate, q, and an ash-pit, 1-, in substantially the usual manner. Doors are provided for the fire-box and ash-pit in the ordinary way. Now, while the cars are connected to the locomotive, or while asufficient supply of steam is furnished to the main pipe it, no fire will be lighted in the stove, and the latter will be dormant, or will serve'merely as a casing for the compound heating-coils D A. -Under these circumstances,

however, the stove may serve as an indirect radiator or ventilator to heat an influx of a fresh air and deliver it into the car. For this purpose I arrange a fresh-air inlet, 8, to discharge into the interior of the stove at the ash-pit or other point, while a register, a, at the top of the casing or base of the stove-pipe below the damper y will allow the air to flow from the easing into the car. The inlet sis provided with a valve or slide, 8, within the car, whereby it may be opened or closed, according to circumstances, while the external opening of the inlet below the car-floor is protected by a screen, as shown in Fig. 1, to exclude dust. It will therefore be understood that when the steam-coil is in operation and the damper 3/ closed, while the slide 8 and register u are opened, fresh air will enter the stove-casing, flow over the compound coil, and thus become heated, and issue from the register a into the car, thus supplying fresh warm air thereto, in addition to the heat radiated from the hotsear-i2 water pipes, and thereby serving to both warm and ventilate the car in an efficient and agreeable manner. The 3' acket 0 between the double casing Z n is also preferably provided with a fresh-air inlet, 25, provided with a valve and screen like that already described, and the outer casing is perforated at the top, as seen at Z in Fig. 1, so that fresh air may also be ad mitted between the casings and thence dis charged warm into the car at the top, so that by regulating the air-slides s t and the register a any desired degree of ventilation may be obtained in a simple manner.

\Vhen a supply of steam cannot be obtained-such as when the car is detached or side-trackeda fire may then be lighted in the stove B, which will of course heat and circulate the water in the coil A and pipes a, and thus diffuse the desired heat in the car. In this case the function of the steam-coil D will of course be dormant; but it will in no way interfere with the action of the stove or the circulation of the water. a I

When the stove is in action, the register u and the slide 8 will of course be closed and the damper y opened to the desired extent. The slide 15 of the inlet t may, however, be opened when desired to admit fresh air bebetween the casings, so as to serve the double purpose of preventing too much heat being radiated from the stove in its direct vicinity, and to admit some warm fresh air into the car, sothat whether the steam-coil or the fire is in operation a means is always provided for admitting fresh air and warming it before discharging it into the car, which means of ventilation and heat-diffusion may be used or not, according to circumstances.

Instead of water, any other suitable liquid may be used in the pipes of the liqnid circuit, as will be readily understood; but salted water is preferred.

In my present application for patent I make no claim to the features of invention herein shown, and which are claimed in my said applications Nos. 230,307 and 238,590, which applications arein volved in sundry interferences. I herein specificall y disclaim the subject-matters in issue in said interferences, namely: First, the combination, with a car, ofa system of circulating-pipes within said car, and two heaters, both in operative contact with said circulating system, or with 'branches thereof,

and adapted to be operated simultaneously or separately for imparting heat thereto; second, in acarheating system, the combination,with a system of water-circulating pipes within the car, of a suitable radiator in contact with said circulating system, or a branch thereof, mechanism for supplying said radiator with steam as a primary means ofheating said circulating system, and a secondary heater also in Opera tive contact with said circulating system and adapted to heat the same; third, in a car-heating system, the combination, with alsystem'of within the car, of a water-circulating pipes main steanrpipe attached to the car and means for connecting it with a suitable generator, a stean1-radiator in operative contact with said circulating system, or a branch thereof, and a branch pipe connecting said main steam-pipe with said radiator and adapted to supply the same with steam.

Such novel features as I haveshown, but not claimed herein, I reserve the right to claim in a subsequent application.

What I claim as my invention is 1. In a heating apparatus, the combination, with a watercoil and a steam-coil arranged one within the other, of a stove within which thedouble coil is placed, a source of steam connecting to the steam-coil, and a water-circulating system connected to the water-coil, substantially as set forth.

2, The combination, with the coil 'A and circuit-pipes a, connecting to the terminals thereof, of the inner heatingcoil, D, inclosed in coil A, with its ends projecting from the ends thereof, a source of steam connected to one end of said stcam-coil,and a trap connected to the opposite end of the same, substantially as shown and described.

3. The compound coils D A, in combination with a stove, B, inclosing and arranged to heat said coils, water-circuit pipes a, connecting to coil A, and astea-m-snpply pipe, 5 connecting to one end of the coil D, with a valve,f, in the connection, and a trap, i, on the opposite end of the coil, substantial] y as herein shown and described.

ED\VAR-D E. GOLD.

\Vitnesscs:

CHAS. M. Hreoms, J NO. E. GAVIN. 

